/*
*  Copyright (c) 2001 Sun Microsystems, Inc.  All rights
*  reserved.
*
*  Redistribution and use in source and binary forms, with or without
*  modification, are permitted provided that the following conditions
*  are met:
*
*  1. Redistributions of source code must retain the above copyright
*  notice, this list of conditions and the following disclaimer.
*
*  2. Redistributions in binary form must reproduce the above copyright
*  notice, this list of conditions and the following disclaimer in
*  the documentation and/or other materials provided with the
*  distribution.
*
*  3. The end-user documentation included with the redistribution,
*  if any, must include the following acknowledgment:
*  "This product includes software developed by the
*  Sun Microsystems, Inc. for Project JXTA."
*  Alternately, this acknowledgment may appear in the software itself,
*  if and wherever such third-party acknowledgments normally appear.
*
*  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA"
*  must not be used to endorse or promote products derived from this
*  software without prior written permission. For written
*  permission, please contact Project JXTA at http://www.jxta.org.
*
*  5. Products derived from this software may not be called "JXTA",
*  nor may "JXTA" appear in their name, without prior written
*  permission of Sun.
*
*  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
*  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
*  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
*  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
*  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
*  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
*  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
*  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
*  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
*  SUCH DAMAGE.
*  ====================================================================
*
*  This software consists of voluntary contributions made by many
*  individuals on behalf of Project JXTA.  For more
*  information on Project JXTA, please see
*  <http://www.jxta.org/>.
*
*  This license is based on the BSD license adopted by the Apache Foundation.
*
*  $Id: ExecFactory.java,v 1.2 2006/06/10 07:03:24 nano Exp $
*/

package net.jxta.myjxta.util.exec;

import java.util.HashMap;
import java.util.Map;

/**
 *
 * @version $Id: ExecFactory.java,v 1.2 2006/06/10 07:03:24 nano Exp $
 *
 * @author james todd [gonzo at jxta dot org]
 * @author mike mcangus [mcangus at jxta dot org]
 */

public final class ExecFactory {

    private static final String OS =
        System.getProperties().getProperty("os.name");
    private static final Exec DEFAULT_STRATEGY = new BaseExec();

    private static final Map<String, Exec> strategies;

    static {
        strategies = new HashMap<String, Exec>();

        Exec win9x = new ExecWindows();

        strategies.put("Windows 95", win9x);
        strategies.put("Windows 98", win9x);

        Exec winnt = new ExecWindowsNT();

        strategies.put("Windows NT", winnt);
        strategies.put("Windows 2000", winnt);
        strategies.put("Windows XP", winnt);

        Exec unix = new ExecUnix();

        strategies.put("Linux", unix);
        strategies.put("SunOS", unix);

        Exec macOSX = new ExecMacOSX();

        strategies.put("Mac OS X",macOSX);
    }

    /**
     * Returns the Exec for the current OS, or the default Exec if no matching Exec exists for the current OS.
     * 
     * @return the Exec for the current OS, or the default Exec if no matching Exec exists for the current OS.
     */
    public static Exec getExec() {
        return (strategies.containsKey(OS) ?
                strategies.get(OS) : DEFAULT_STRATEGY);
    }
}
